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authorJoe Stringer <joe@ovn.org>2015-12-23 14:39:27 -0800
committerDavid S. Miller <davem@davemloft.net>2015-12-29 15:27:52 -0500
commit90c7afc96cbbd77f44094b5b651261968e97de67 (patch)
tree33ca2fb418b80e805dddf278843ed143442e9451
parent3538a5c8ffa37c715029af4a2e384c077558eb18 (diff)
openvswitch: Fix template leak in error cases.
Commit 5b48bb8506c5 ("openvswitch: Fix helper reference leak") fixed a reference leak on helper objects, but inadvertently introduced a leak on the ct template. Previously, ct_info.ct->general.use was initialized to 0 by nf_ct_tmpl_alloc() and only incremented when ovs_ct_copy_action() returned successful. If an error occurred while adding the helper or adding the action to the actions buffer, the __ovs_ct_free_action() cleanup would use nf_ct_put() to free the entry; However, this relies on atomic_dec_and_test(ct_info.ct->general.use). This reference must be incremented first, or nf_ct_put() will never free it. Fix the issue by acquiring a reference to the template immediately after allocation. Fixes: cae3a2627520 ("openvswitch: Allow attaching helpers to ct action") Fixes: 5b48bb8506c5 ("openvswitch: Fix helper reference leak") Signed-off-by: Joe Stringer <joe@ovn.org> Signed-off-by: David S. Miller <davem@davemloft.net>
-rw-r--r--net/openvswitch/conntrack.c6
1 files changed, 4 insertions, 2 deletions
diff --git a/net/openvswitch/conntrack.c b/net/openvswitch/conntrack.c
index 3e8892216f94..e004067ec24a 100644
--- a/net/openvswitch/conntrack.c
+++ b/net/openvswitch/conntrack.c
@@ -698,6 +698,10 @@ int ovs_ct_copy_action(struct net *net, const struct nlattr *attr,
OVS_NLERR(log, "Failed to allocate conntrack template");
return -ENOMEM;
}
+
+ __set_bit(IPS_CONFIRMED_BIT, &ct_info.ct->status);
+ nf_conntrack_get(&ct_info.ct->ct_general);
+
if (helper) {
err = ovs_ct_add_helper(&ct_info, helper, key, log);
if (err)
@@ -709,8 +713,6 @@ int ovs_ct_copy_action(struct net *net, const struct nlattr *attr,
if (err)
goto err_free_ct;
- __set_bit(IPS_CONFIRMED_BIT, &ct_info.ct->status);
- nf_conntrack_get(&ct_info.ct->ct_general);
return 0;
err_free_ct:
__ovs_ct_free_action(&ct_info);